37 lines
995 B
Rust
37 lines
995 B
Rust
// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// ignore-windows
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// exec-env:RUST_LOG=debug
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use std::cell::Cell;
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use std::fmt;
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use std::thread;
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struct Foo(Cell<isize>);
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impl fmt::Debug for Foo {
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fn fmt(&self, _fmt: &mut fmt::Formatter) -> fmt::Result {
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let Foo(ref f) = *self;
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assert!(f.get() == 0);
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f.set(1);
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Ok(())
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}
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}
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pub fn main() {
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thread::spawn(move|| {
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let mut f = Foo(Cell::new(0));
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println!("{:?}", f);
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let Foo(ref mut f) = f;
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assert!(f.get() == 1);
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}).join().ok().unwrap();
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}
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